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