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