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