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