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