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