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