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