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