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