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