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