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