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