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