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