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