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