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