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