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