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