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