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