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