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