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