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