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