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