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