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