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