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