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