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