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