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