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