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