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)(7,12,19,27,20,28,18,32)(8,21,23,13,25,30,24,31)(17,33,22,26,34,29,35,36)(1,2,4,3)(5,7,10,19,11,20,9,18)(6,12,14,27,16,28,15,32)(8,22,23,34,25,35,24,17)(13,29,30,36,31,33,21,26)(5,8,9,24,11,25,10,23)(6,13,15,21,16,31,14,30)(7,17,19,22,20,34,18,35)(12,26,27,29,28,36,32,33)(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.