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