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