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)(19,23)(20,25)(21,26)(22,27)(24,28)(29,31)(30,32)(33,34,39,43)(35,37,41,48)(36,42,38,40)(44,47,45,46)(2,3)(7,9)(8,10)(15,16)(17,19)(18,23)(20,29)(21,30)(22,28)(24,27)(25,31)(26,32)(33,35)(34,37)(36,44)(38,45)(39,41)(40,46)(42,47)(43,48) involution — undirected(2,3)(7,9)(8,10)(15,16)(19,28)(23,24)(29,32)(30,31)(33,36,39,38)(34,40,43,42)(35,44,41,45)(37,46,48,47)(1,3,6,2)(4,9,12,7)(5,8,14,10)(11,15,13,16)(17,19)(18,24)(20,29)(21,31)(22,28)(23,27)(25,30)(26,32)(33,37)(34,41)(35,43)(36,46)(38,47)(39,48)(40,45)(42,44)(1,4,6,12)(2,7,3,9)(5,13,14,11)(8,16,10,15)(17,20)(18,25)(19,29)(21,27)(22,26)(23,31)(24,30)(28,32)(33,38,39,36)(34,42,43,40)(35,45,41,44)(37,47,48,46)(1,5,6,14)(2,8,3,10)(4,11,12,13)(7,15,9,16)(17,21,22,25)(18,26,27,20)(19,30,28,31)(23,32,24,29)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.