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