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