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