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