I'd like to know that as well. The rolecard states that there are different levels of accuracy in finding out someone's role, so you can't pinpoint someone's role. That means there need to be different levels of pairings...
Perhaps citizens are their own separate category, and the Godfather comes up in a "leader of men" kind of category (mayor/mason leader/cult leader/godfather), which is further refined to mayor/godfather and mason leader/cult leader on the next level.