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)(21,22,25,27,26,30,24,29)(23,31,34,28,32,36,33,35)(1,2,3,4)(5,6,8,15,9,12,17,10)(7,11,16,20,14,19,13,18)(22,27)(24,25)(28,31)(29,30)(33,34)(35,36)(5,7)(6,11)(8,16)(9,14)(10,18)(12,19)(13,17)(15,20)(21,23)(22,28)(24,34)(25,33)(26,32)(27,31)(29,36)(30,35) involution — undirected(6,12)(10,15)(11,19)(18,20)(23,32)(28,35)(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.