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