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