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