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