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