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