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