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