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