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)(11,13)(12,14)(15,16)(17,18,23,27,24,28,22,26)(19,29,30,21,25,31,32,20)(9,11)(10,13)(12,15)(14,16)(17,19,24,25)(18,20,28,21)(22,30,23,32)(26,29,27,31)(2,5)(6,8)(10,14)(11,15)(17,20)(18,25)(19,28)(21,24)(22,31)(23,29)(26,30)(27,32) involution — undirected(11,15)(13,16)(17,21,24,20)(18,25,28,19)(22,29,23,31)(26,30,27,32)(1,3,4,7)(2,6,5,8)(17,22,24,23)(18,26,28,27)(19,30,25,32)(20,29,21,31)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.