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