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)(17,18,22,21)(19,23,26,29)(20,24,28,27)(25,31,32,30)(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)(8,16)(9,15)(11,14)(17,19)(18,23)(20,25)(21,29)(22,26)(24,30)(27,31)(28,32)(34,39)(36,37)(40,47)(41,42)(43,48)(45,46) involution — undirected(1,3)(2,7)(4,11)(5,10)(6,12)(8,15)(9,16)(13,14)(17,20,22,28)(18,24,21,27)(19,25,26,32)(23,30,29,31)(33,35,38,44)(34,40,42,48)(36,46,37,45)(39,47,41,43)(3,10)(6,15)(7,16)(11,13)(17,21,22,18)(19,23,26,29)(20,27,28,24)(25,30,32,31)(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.