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