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