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