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