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