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