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