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