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