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