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