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