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