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