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