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