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