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