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