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