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