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