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