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