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