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