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