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