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