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