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