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