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