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