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