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