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