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