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