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