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