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