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