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