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