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