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