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