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