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