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