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