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)(11,19)(12,17)(13,23)(14,15)(16,21)(18,24)(20,22)(25,26)(27,30)(28,33)(29,34)(31,35)(32,38)(36,37)(39,40) involution — undirected(2,5)(6,7)(10,15)(12,22)(16,19)(18,23)(25,27,31,38)(26,32,35,30)(28,36,34,40)(29,37,33,39)(1,2)(3,6)(4,5)(7,8)(9,11,14,21)(10,16,15,19)(12,23,22,18)(13,17,24,20)(25,28,31,34)(26,33,35,29)(27,36,38,40)(30,37,32,39)(1,3,4,8)(2,6,5,7)(9,11)(10,16)(12,23)(13,20)(14,21)(15,19)(17,24)(18,22)(25,28)(26,29)(27,36)(30,39)(31,34)(32,37)(33,35)(38,40)(9,12,14,22)(10,17,15,20)(11,18,21,23)(13,19,24,16)(25,29)(26,34)(27,37)(28,35)(30,36)(31,33)(32,40)(38,39)(9,13)(10,18)(11,20)(12,19)(14,24)(15,23)(16,22)(17,21)(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.