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