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