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