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)(18,24)(20,32)(21,22)(25,28)(26,33)(27,36)(29,43)(30,37)(34,35)(38,41)(42,44)(45,48) involution — undirected(2,7)(3,12)(5,6)(8,11)(13,14)(15,16)(17,18,22,36,23,27,21,24)(19,28,37,41,31,38,30,25)(20,33,34,39,35,26,32,46)(29,44,48,40,45,42,43,47)(1,3,4,13)(2,8,7,15)(5,12,6,14)(9,16,10,11)(17,19)(18,25)(20,29)(21,30)(22,37)(23,31)(24,38)(26,40)(27,41)(28,36)(32,43)(33,47)(34,48)(35,45)(39,44)(42,46)(2,7)(8,15)(9,10)(11,16)(17,20,22,34,23,35,21,32)(18,26,36,46,27,33,24,39)(19,29,37,48,31,45,30,43)(25,40,28,42,41,47,38,44)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.