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