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)(13,14,16,18)(15,17,19,20)(22,24)(23,31)(25,26)(29,30)(32,36)(34,35)(6,9)(10,12)(13,15,16,19)(14,17,18,20)(21,22,25,24,27,30,26,29)(23,32,31,28,35,36,34,33)(7,11)(10,12)(14,18)(17,20)(21,23,27,35)(22,28,30,33)(24,32,29,36)(25,34,26,31)(2,4)(5,7,8,11)(6,10,9,12)(21,24,26,22,27,29,25,30)(23,33,34,36,35,28,31,32)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.