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