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