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)(18,22,25,24)(19,26,28,27)(1,3,4,12,5,11,13,10)(2,6,8,16,7,14,15,9)(17,18,20,24,21,25,29,22)(19,23,27,31,28,32,26,30)(17,19)(18,23)(20,27)(21,28)(22,30)(24,31)(25,32)(26,29) involution — undirected(2,7)(6,14)(8,15)(9,16)(17,20,21,29)(18,24,25,22)(19,27,28,26)(23,31,32,30)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.