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)(17,18,21,24)(19,22,27,25)(20,28,29,23)(26,31,32,30)(33,34,38,39)(35,41,42,36)(37,45,46,40)(43,44,47,48)(1,3,5,4)(2,6,8,7)(9,10,13,12)(11,15,16,14)(20,29)(23,28)(26,32)(30,31)(34,39)(35,42)(37,46)(44,48)(9,11,13,16)(10,14,12,15)(17,18)(19,25)(20,23)(21,24)(22,27)(26,31)(28,29)(30,32)(33,35,38,42)(34,36,39,41)(37,47,46,43)(40,48,45,44)(1,2)(3,6)(4,7)(5,8)(9,10,13,12)(11,14,16,15)(17,19)(18,22)(20,26)(21,27)(23,30)(24,25)(28,31)(29,32)(33,36)(34,35)(37,48)(38,41)(39,42)(40,47)(43,45)(44,46)(1,4,5,3)(2,7,8,6)(9,12,13,10)(11,15,16,14)(17,20)(18,23)(19,26)(21,29)(22,30)(24,28)(25,31)(27,32)(33,37,38,46)(34,40,39,45)(35,43,42,47)(36,44,41,48)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.