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