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