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