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