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