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