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