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