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