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)(13,17)(14,18)(15,19)(16,20)(21,22,25,29)(23,30,33,36)(24,28,26,34)(27,35,31,32)(2,4)(5,7)(6,10)(8,15)(9,13)(11,19)(12,17)(14,16)(18,20)(21,22)(23,31)(24,34)(25,29)(26,28)(27,33)(30,35)(32,36) involution — undirected(7,13)(10,17)(14,15)(18,19)(21,23,25,33)(22,27,29,31)(24,32,26,35)(28,36,34,30)(5,8,9,16)(6,11,12,20)(7,14,13,15)(10,18,17,19)(21,24,25,26)(22,28,29,34)(23,32,33,35)(27,36,31,30)(6,12)(10,17)(11,20)(18,19)(22,29)(27,31)(28,34)(30,36) 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.