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