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