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