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