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