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