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