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