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