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