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