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)(17,18,22,25)(19,26,28,31)(20,24,21,29)(23,30,32,27)(33,34,37,41)(35,38,43,46)(36,39,45,40)(42,47,44,48)(1,3,5,11)(2,6,8,9)(4,10,12,16)(7,13,14,15)(33,35)(34,38)(36,42)(37,43)(39,47)(40,48)(41,46)(44,45)(1,4)(2,7)(3,10)(5,12)(6,13)(8,14)(9,15)(11,16)(17,19,22,28)(18,23,25,32)(20,27,21,30)(24,31,29,26)(34,39)(35,42)(36,45)(40,41)(43,44)(47,48)(4,12)(7,14)(10,16)(13,15)(17,20,22,21)(18,24,25,29)(19,27,28,30)(23,31,32,26)(35,43)(38,46)(42,44)(47,48)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.