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