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