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