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