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)(21,22,26,31)(23,32,33,36)(24,30,25,29)(27,35,28,34)(1,2)(3,4)(5,7,9,15)(6,10,12,19)(8,17,18,14)(11,20,16,13)(21,23,26,33)(22,27,31,28)(24,35,25,34)(29,36,30,32)(2,4)(21,23)(22,28)(24,35)(25,34)(26,33)(27,31)(29,32)(30,36) involution — undirected(23,33)(27,28)(32,36)(34,35) 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.