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