Notice though how every photo of the devil is a ripped muscle person. What's the connection?
The connection is that they wanted to portray Jesus as the humble alternative that has no care for intimidation and such, instead focusing on inner qualities, while Lucifer was the opposite path, where power and the fastest way to everything was the right way.
Satan represented Force and War, while Jesus/God represented peace and tranquility with oneself.
Thus, Satan was often portrayed as a Warrior while Jesus was often portrayed as a calm, kind, skinny dude with a long beard (not caring about how others perceive him and thus never shaved).