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