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