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