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