This Powershell scripts generates a nice workflow diagram from a TFS work item template definition file. See http://thomasfreudenberg.com/archive/2018/01/16/generating-workflow-diagram-for-witd/ for details

Create-WorkflowDiagramFromWitd.ps1

[CmdletBinding()]
param(
  [Parameter(Mandatory=$true, HelpMessage="Path to work item template definition file")]
  [string]
  $witdPath
)

# path to dot.exe; e.g. use "choco install graphviz"
$dotPath = "C:\ProgramData\chocolatey\bin\dot.exe"

$output = $witdPath + ".dot"
$outputPng = Join-Path $PSScriptRoot "$($witdPath).png"

# colors used for allowed users or groups. I don't expect more then 5 different users/groups
$colorStack = new-object system.collections.stack
$colorStack.Push("indigo")
$colorStack.Push("brown1")
$colorStack.Push("blue")
$colorStack.Push("forestgreen")
$colorStack.Push("red")

# this set will map users/groups to colors
$permissionToColor = @{}

"digraph Workflow {
    graph [fontname = ""Calibri""]
    node [fontname = ""Calibri""]
    edge [fontname = ""Calibri""]
    rankdir=LR
    #splines=ortho" | Out-File -FilePath $output -Encoding ASCII

# get all edges/transitions
Select-Xml -Path $witdPath -XPath "//TRANSITIONS/TRANSITION" | % { 
    if ($_.node.for) {
        $color = $permissionToColor[$_.node.for]
        if (!$color) {
            $color = $colorStack.Pop()
            $permissionToColor[$_.node.for] = $color
        }
    } else {
        $label = ""
        $color = "black"
    }

    "  ""$($_.node.from)"" -> ""$($_.node.to)"" [color=$color]" | Out-File -FilePath $output -Append -Encoding ASCII
}

# if any transition is restricted to certain users/groups, draw a legend
if ($permissionToColor.Count -gt 0) {
    '  subgraph legend { 
    node [shape=plaintext]
    label = "Legend";
    key [label=<<table border="0" cellpadding="2" cellspacing="0" cellborder="0">' | Out-File -FilePath $output -Append -Encoding ASCII

    $i = 0
    $permissionToColor.GetEnumerator() | % {
        "      <tr><td align=""right"" port=""i$i"">$($_.Name)</td></tr>" | Out-File -FilePath $output -Append -Encoding ASCII
        $i++
    }
    '      </table>>]
    key2 [label=<<table border="0" cellpadding="2" cellspacing="0" cellborder="0">' | Out-File -FilePath $output -Append -Encoding ASCII

    $i = 0
    $permissionToColor.GetEnumerator() | % {
        "      <tr><td port=""i$i"">&nbsp;</td></tr>" | Out-File -FilePath $output -Append -Encoding ASCII
        $i++
    }
    '      </table>>]' | Out-File -FilePath $output -Append -Encoding ASCII
    $i = 0
    $permissionToColor.GetEnumerator() | % {
        "    key:i$($i):e -> key2:i$($i):w [color=$($_.Value)]" | Out-File -FilePath $output -Append -Encoding ASCII
        $i++
    }
    '  }' | Out-File -FilePath $output -Append -Encoding ASCII
}

"}" | Out-File -FilePath $output -Append -Encoding ASCII

# call dot.exe to generate the image
& $dotPath -Tpng $output -o $outputPng

# delete the DOT graph file
Remove-Item $output