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)(17,18,22,26,23,25,21,20)(19,27,30,24,29,31,28,32)(2,7)(3,12)(4,5)(8,16)(11,15)(13,14)(17,19)(18,24)(20,31)(21,30)(22,28)(23,29)(25,32)(26,27) involution — undirected(1,3)(2,8,7,15)(4,13)(5,12)(6,14)(9,11,10,16)(17,20,21,25,23,26,22,18)(19,27,28,32,29,31,30,24)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.