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