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