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