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