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