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