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