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