Dump xgboost trees visualisation to the file system in pdf format.

dump-xgboost-trees.py

model = xgb.Booster(model_file='your.model')
model.feature_names = xgtrain.feature_names  # Note: xgtrain is your train file with features.
model.feature_types = xgtrain.feature_types

# Number of trees in the model
num_trees = len(model.get_dump())

# dump all of the trees to tree folder
for tree_index in range(num_trees):
    dot = xgb.to_graphviz(model, num_trees=tree_index)
    dot.render("trees/tree{}".format(tree_index))