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