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