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)(19,25)(20,24)(21,26)(22,23)(27,32)(28,29)(30,31)(33,34,39,36)(35,42,37,40)(38,44,46,41)(43,47,45,48)(2,6)(7,14)(8,11)(15,16)(17,19)(18,21)(20,28)(22,26)(23,25)(24,32)(27,30)(29,31)(33,34,39,36)(35,40,37,42)(38,41,46,44)(43,47,45,48)(2,6)(7,14)(8,11)(15,16)(18,23)(19,26)(24,31)(27,28)(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)(17,19)(18,21)(20,27)(22,26)(23,25)(24,29)(28,30)(31,32)(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)(17,20,22,30)(18,24,23,31)(19,27,26,28)(21,29,25,32)(33,37,39,35)(34,40,36,42)(38,45,46,43)(41,47,44,48)(1,4)(2,8)(3,9)(5,13)(6,11)(7,15)(10,12)(14,16)(17,21)(18,19)(20,29)(22,25)(23,26)(24,27)(28,31)(30,32)(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.