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