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