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