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