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