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