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