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