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