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