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