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