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)(19,26,29,23)(20,28,30,25)(21,31,32,27)(33,34,39,43)(35,40,37,42)(36,46,38,41)(44,48,45,47)(1,2)(3,6)(4,7)(5,8)(9,11)(10,14)(12,15)(13,16)(17,19,22,29)(18,23,24,26)(20,27,30,31)(21,28,32,25)(33,35,39,37)(34,40,43,42)(36,45,38,44)(41,48,46,47)(18,24)(20,30)(23,26)(27,31)(33,36,39,38)(34,41,43,46)(35,44,37,45)(40,47,42,48)(1,2)(3,9)(4,7)(5,8)(6,11)(10,15)(12,14)(13,16)(17,20,22,30)(18,25,24,28)(19,27,29,31)(21,26,32,23)(33,37,39,35)(34,42,43,40)(36,44,38,45)(41,47,46,48)(1,3,5,11)(2,6,8,9)(4,12,13,10)(7,15,16,14)(17,19)(18,26)(20,31)(21,25)(22,29)(23,24)(27,30)(28,32)(33,38,39,36)(34,41,43,46)(35,45,37,44)(40,47,42,48)(1,4,5,13)(2,7,8,16)(3,10,11,12)(6,14,9,15)(17,21)(18,27)(19,28)(20,26)(22,32)(23,30)(24,31)(25,29)(33,34)(35,40)(36,41)(37,42)(38,46)(39,43)(44,47)(45,48)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.