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