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