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