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)(19,25)(20,34)(21,40)(22,28)(23,29)(24,30)(26,37)(27,32)(31,43)(33,42)(35,41)(36,48)(38,45)(39,44)(46,47)(1,3,5,4)(2,6,8,7)(9,11)(10,14)(12,15)(13,16)(17,19)(18,25)(20,35)(21,24)(22,32)(23,33)(26,43)(27,28)(29,42)(30,40)(31,37)(34,41)(36,38)(39,46)(44,47)(45,48)(1,3,5,4)(2,7,8,6)(9,12,13,10)(11,15,16,14)(17,20,23,38,24,39,22,37)(18,26,28,44,30,45,29,34)(19,31,32,46,21,36,33,35)(25,41,42,48,40,47,27,43)(1,4,5,3)(2,6,8,7)(11,16)(14,15)(17,21,22,32,24,19,23,33)(18,27,29,40,30,42,28,25)(20,36,37,46,39,31,38,35)(26,43,34,47,45,48,44,41)(2,8)(6,7)(17,22,24,23)(18,28,30,29)(19,32,21,33)(20,37,39,38)(25,27,40,42)(26,44,45,34)(31,46,36,35)(41,43,47,48)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.