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