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