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