Jake and Amy are in a relationship so they should definitely be next to each other. Jake, Charles and Rosa should be near each other since they're all friends. Scully and Hitchcock are a duo so they should be togther in the graphic but imo can be on the smaller side since they're more comic relief/supporting main cast. The show is pretty much an ensemble show, so everyone interacts with everyone
This is just my idea from the 4-ish seasons I've seen to help the team, if anyone has any other opinions, please post them!