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