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