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