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)(19,23)(20,22)(21,24)(25,27)(26,31)(28,30)(29,32)(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)(20,22)(21,24)(23,27)(26,32)(28,30)(29,31)(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)(18,20)(23,25)(24,28)(31,32)(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)(17,19)(18,23)(20,25)(21,29)(22,27)(24,32)(26,30)(28,31)(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)(17,20,22,18)(19,25,27,23)(21,28,30,24)(26,32,29,31)(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)(17,21,22,30)(18,24,20,28)(19,26,27,29)(23,31,25,32)(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.