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)(11,15)(12,16)(13,14)(17,18,23,28)(19,29,33,39)(20,34,35,42)(21,27,22,26)(24,32,40,31)(25,36,41,37)(30,38,44,48)(43,45,47,46)(2,6)(7,8)(10,14)(11,12)(17,19,22,32,23,33,21,31)(18,24,27,39,28,40,26,29)(20,30,37,46,35,44,36,45)(25,38,34,47,41,48,42,43)(1,3,5,4)(2,7,6,8)(9,11,13,12)(10,15,14,16)(17,20,22,37,23,35,21,36)(18,25,27,34,28,41,26,42)(19,30,32,46,33,44,31,45)(24,38,39,47,40,48,29,43)(1,4,5,3)(2,8,6,7)(11,12)(15,16)(9,12,13,11)(10,16,14,15)(20,35)(25,41)(30,44)(34,42)(36,37)(38,48)(43,47)(45,46)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.