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