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