One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6)(7,11)(8,16)(9,18)(10,14)(12,17)(13,19)(15,20)(21,22,25,29,26,24,28,33)(23,27,31,34,30,32,35,36)(1,2,3,4)(5,7,10,8)(6,11,14,16)(9,15,19,17)(12,18,20,13)(21,23)(22,27)(24,32)(25,31)(26,30)(28,35)(29,34)(33,36)(5,8,10,7)(6,12,14,20)(9,15,19,17)(11,18,16,13)(23,30)(27,32)(31,35)(34,36)(7,8)(11,16)(12,20)(15,17)(21,24,25,33,26,22,28,29)(23,27,31,34,30,32,35,36)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.