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