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