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