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