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