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