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