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