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