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