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