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