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