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