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