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