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