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