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