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