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