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