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