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