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