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