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