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