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