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