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