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