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