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