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