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