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