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