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