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