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