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