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