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