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