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