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