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