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