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