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