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