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