One more complete tutorial is here.
First of all, you need to create an FB App on developers.facebook.com. After that, you need to get your access token.
Then, get the values of these information:
client_id
client_secret
Now, to get your access token, replace the following values:
https://graph.facebook.com/oauth/access_token?client_id=YOUR_APP_ID&client_secret=YOUR_APP_SECRET&grant_type=client_credentials
Press enter and you'll receive something like:
access_token=1650491291893473|0ReloFG4y0-zSMgDgiRnUj52sZE
You gonna do the same: replace information.
http://graph.facebook.com/v2.3/{$fb_page_id}/albums?fields={$fields}&access_token={$access_token}
Example:
https://graph.facebook.com/v2.5/1417871328537114/photos?fields=source,caption&access_token=139987246164446|Qvp0YFGf552qiqWh8iCj2Ofx0uk&limit=30
That's it.