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