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)(26,31)(27,35)(29,32)(33,36)(34,39)(37,40)(2,5)(6,8)(9,11,13,17)(10,14,15,21)(12,18,19,23)(16,20,22,24)(25,26,32,39,30,34,29,31)(27,36,40,38,37,33,35,28)(1,3,4,7)(2,6,5,8)(10,15)(11,17)(12,19)(20,24)(25,27,29,35,30,37,32,40)(26,33,31,38,34,36,39,28)(9,12,13,19)(10,16,15,22)(11,18,17,23)(14,20,21,24)(25,28,30,38)(26,27,34,37)(29,33,32,36)(31,35,39,40)(11,17)(14,21)(18,23)(20,24)(26,34)(28,38)(31,39)(33,36) 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.