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