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