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