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