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