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