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