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