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