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