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