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