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