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