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