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