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)(17,18,21,25,20,24,27,23)(19,26,30,32,29,22,28,31)(2,8,12,11)(3,14,10,15)(4,16)(9,13)(17,19,27,28,20,29,21,30)(18,22,23,32,24,26,25,31)(1,3)(2,9)(4,8)(5,14)(6,10)(7,15)(11,16)(12,13)(18,23)(19,28)(21,27)(22,26)(24,25)(29,30) involution — undirected(1,4,5,9,6,16,7,13)(2,10,11,15,12,3,8,14)(18,24)(22,26)(23,25)(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.