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