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