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