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