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