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