When Diao is not playing, Stoke are hoping to use him to improve their contacts in Africa and Europe, and particularly help them recruit young players.
Diao told The Sentinel: "I have a lot of contacts in Africa and in football, so hopefully I can influence players to sign for Stoke.
"Also, I speak French, Italian and Spanish so I can help lads from abroad to settle here.
"When young kids come from abroad, I can be their guide to the football club.
"It is difficult settling at a new club in a new country, no matter how old you are."