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