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