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