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