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