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