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