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