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