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)(21,22)(23,33)(24,28)(25,32)(26,31)(27,30)(29,35)(34,36) involution — undirected(1,2)(3,4)(5,7)(6,11)(8,15)(9,18)(10,16)(12,19)(13,14)(17,20)(21,23)(22,28)(24,26)(25,35)(27,34)(29,30)(31,33)(32,36) involution — undirected(2,4)(21,24,26,23)(22,29,31,36)(25,35,27,34)(28,32,33,30)(5,8,10,9)(6,12,13,17)(7,15,16,18)(11,19,14,20)(21,25,26,27)(22,30,31,32)(23,34,24,35)(28,36,33,29)(2,4)(5,9,10,8)(6,12,13,17)(7,15,16,18)(11,20,14,19)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.