I've seen this quoted a lot in regard to illustrating the bias of refs - but don't necessarily think it tells the whole story.
One of the reasons we get so many yellow cards is the way we play. Yes we have a larger share of possession, but we also push so many players up the pitch when we attack, leaving us vulnerable to the counter. Thus if we lose possession we either need to win it back quickly, or stop the play to regroup. Because of this you can clearly see our players making tough challenges to accomplish this, and in many cases they are professional fouls and draw cards because of it. Fernandinho is a master of this, and even KDB and Silva join in as well. These fouls are somewhat cynical and the cards we receive are because of it.