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