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