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