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