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