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