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