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