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