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