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