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