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