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