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