One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,7,6,11,10,23)(3,12,14,15,16,24,22,8)(4,17,19,27,20,9,21,25)(13,28,29,32,31,18,30,26)(1,3,6,16)(2,8,11,15)(4,18)(5,22,10,14)(7,24,23,12)(9,13)(17,31)(19,32)(20,28)(21,26)(25,30)(27,29)(1,4,5,19,6,20,10,21)(2,9,7,25,11,17,23,27)(3,13,14,29,16,31,22,30)(8,26,12,28,15,32,24,18)(1,2,10,23,6,11,5,7)(3,8,14,12,16,15,22,24)(4,9,21,27,20,17,19,25)(13,26,29,28,31,32,30,18)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.