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