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