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