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