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