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