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