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