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