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