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