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