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