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