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