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