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