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