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