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