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