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