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