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)(11,16)(12,14)(13,15)(17,18,22,23)(19,21,25,27)(20,24,30,32)(26,31,28,29)(33,34,38,37)(35,39,41,43)(36,40,44,45)(42,46,47,48)(2,4)(3,10)(8,12)(11,13)(17,19)(18,21)(20,28)(22,25)(23,27)(24,29)(26,30)(31,32)(35,41)(39,43)(42,47)(46,48) involution — undirected(2,4)(7,9)(8,12)(15,16)(18,23)(19,25)(24,32)(26,28)(33,35,38,41)(34,39,37,43)(36,42,44,47)(40,46,45,48)(1,3,6,10)(2,7,4,9)(5,13,14,11)(8,16,12,15)(17,20,22,30)(18,24,23,32)(19,26,25,28)(21,31,27,29)(33,36)(34,40)(35,42)(37,45)(38,44)(39,46)(41,47)(43,48)(1,4,6,2)(3,9,10,7)(5,12,14,8)(11,16,13,15)(17,18)(19,27)(20,24)(21,25)(22,23)(26,29)(28,31)(30,32)(33,35)(34,39)(36,42)(37,43)(38,41)(40,46)(44,47)(45,48)(1,5,6,14)(2,8,4,12)(3,11,10,13)(7,15,9,16)(17,21,22,27)(18,25,23,19)(20,29,30,31)(24,26,32,28)(33,37,38,34)(35,43,41,39)(36,40,44,45)(42,46,47,48)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.