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