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