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)(33,34,39,43)(35,42,37,40)(36,41,47,38)(44,48,46,45)(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)(33,35,39,37)(34,40,43,42)(36,46,47,44)(38,45,41,48)(3,4)(8,14)(12,15)(13,16)(20,28)(25,30)(27,29)(31,32)(33,35,39,37)(34,40,43,42)(36,46,47,44)(38,45,41,48)(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)(33,36,39,47)(34,41,43,38)(35,44,37,46)(40,45,42,48)(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)(34,42,43,40)(36,46,47,44)(38,45,41,48)(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)(33,38,39,41)(34,36,43,47)(35,45,37,48)(40,46,42,44)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.