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