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