One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(9,10,15,20)(11,21,24,39)(12,25,28,38)(13,29,26,40)(14,31,30,19)(16,32,35,23)(17,36,34,27)(18,37,33,22)(5,6)(7,8)(9,11,22,27,14,12,26,32,15,24,37,36,30,28,13,23)(10,16,29,38,19,34,33,39,20,35,40,25,31,17,18,21)(1,2,3,4)(6,8)(9,12,22,32,14,24,26,36,15,28,37,23,30,11,13,27)(10,17,29,21,19,16,33,38,20,34,40,39,31,35,18,25)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.