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