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