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