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