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