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