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