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