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