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