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