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