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