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