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