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