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