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