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