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