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