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