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