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