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