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