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