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