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