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