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