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