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