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