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