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