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