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