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