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