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