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