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