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