One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10)(11,15)(12,14)(13,16)(17,18,24,29)(19,25,32,42)(20,33,38,44)(21,39,31,41)(22,27,23,28)(26,36,45,37)(30,43,46,48)(34,40,35,47)(2,5)(6,8)(9,11)(10,13)(12,16)(14,15)(17,19,24,32)(18,25,29,42)(20,34,38,35)(21,22,31,23)(26,43,45,48)(27,41,28,39)(30,36,46,37)(33,40,44,47)(10,14)(11,16)(17,20,23,37,24,38,22,36)(18,26,27,33,29,45,28,44)(19,30,31,34,32,46,21,35)(25,40,39,43,42,47,41,48)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,21,22,32,24,31,23,19)(18,25,28,41,29,42,27,39)(20,35,36,46,38,34,37,30)(26,40,44,48,45,47,33,43)(2,5)(6,8)(10,14)(13,15)(17,22,24,23)(18,27,29,28)(19,31,32,21)(20,36,38,37)(25,41,42,39)(26,33,45,44)(30,34,46,35)(40,48,47,43)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.