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