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