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