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