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