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