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