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