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