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