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