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