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