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