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