One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6)(7,14)(8,17)(9,12)(10,13)(11,16)(15,19)(18,20)(21,22,26,25)(23,27,30,33)(24,28,32,34)(29,35,36,31)(5,7)(6,11)(8,15)(9,18)(10,16)(12,19)(13,14)(17,20)(21,23,26,30)(22,27,25,33)(24,31,32,35)(28,29,34,36)(2,4)(21,24,26,32)(22,28,25,34)(23,29,30,36)(27,35,33,31)(5,8,10,9)(6,12,13,17)(7,15,16,18)(11,19,14,20)(24,32)(28,34)(29,36)(31,35)(5,9,10,8)(6,12,13,17)(7,15,16,18)(11,20,14,19)(22,25)(23,27)(28,34)(29,35)(30,33)(31,36)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.