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