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