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