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