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