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