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