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