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