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