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