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