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