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