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