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