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