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