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