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