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