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