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)(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)(17,18)(19,24)(20,25)(21,26)(22,23)(27,30)(28,29)(31,32)(33,35,40,47)(34,41,45,48)(36,37,38,46)(39,44,43,42)(4,13)(7,12)(11,16)(14,15)(18,23)(19,25)(26,32)(27,29)(33,36,40,38)(34,42,45,44)(35,46,47,37)(39,41,43,48)(1,4,6,13)(2,7,10,12)(3,11,9,16)(5,15,8,14)(17,19,22,25)(18,24,23,20)(21,29,31,27)(26,28,32,30)(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)(17,20,22,24)(18,25,23,19)(21,30,31,28)(26,27,32,29)(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)(17,21,22,31)(18,26,23,32)(19,27,25,29)(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.