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