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