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