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