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