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)(24,32)(26,35)(28,33)(31,34) involution — undirected(1,2)(3,4)(5,7,10,17)(6,11,13,18)(8,16,9,15)(12,20,14,19)(21,22)(23,29)(24,33)(25,27)(26,31)(28,32)(30,36)(34,35)(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)(29,33)(31,32)(6,13)(11,18)(12,14)(19,20)(23,30)(26,35)(29,36)(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.