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