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