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