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