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