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