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