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