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