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