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