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