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