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