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