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