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