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