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