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