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