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)(7,11)(12,16)(13,15)(20,27)(22,29)(23,28)(25,31)(33,34,37,40)(35,41,43,48)(36,44,46,39)(38,45,47,42)(1,3)(2,7)(4,11)(5,12)(6,13)(8,15)(9,16)(10,14)(17,18)(19,22)(20,28)(21,24)(23,27)(25,32)(26,29)(30,31) involution — undirected(1,4,6,5)(2,8,9,14)(3,11,13,12)(7,15,16,10)(17,19,21,26)(18,22,24,29)(20,25,27,31)(23,30,28,32)(33,35,37,43)(34,38,40,47)(36,45,46,42)(39,48,44,41)(1,4,6,5)(2,8,9,14)(3,12,13,11)(7,10,16,15)(17,20,21,27)(18,23,24,28)(19,25,26,31)(22,30,29,32)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.