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