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)(17,18,21,26,22,25,35,41)(19,27,30,37,29,42,34,23)(20,24,33,40,32,39,47,48)(28,43,44,38,31,45,46,36)(9,10)(11,14)(12,13)(15,16)(17,19,22,29)(18,23,25,37)(20,31,32,28)(21,34,35,30)(24,38,39,36)(26,42,41,27)(33,44,47,46)(40,43,48,45)(1,3,5,4)(2,6,7,8)(10,13)(14,16)(17,20,22,32)(18,24,25,39)(19,28,29,31)(21,33,35,47)(23,36,37,38)(26,40,41,48)(27,43,42,45)(30,44,34,46)(1,4,5,3)(2,6,7,8)(10,13)(14,16)(19,29)(20,32)(23,37)(24,39)(27,42)(30,34)(33,47)(40,48)(9,11,12,15)(10,14,13,16)(18,25)(23,37)(24,39)(26,41)(27,42)(36,38)(40,48)(43,45)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.