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