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