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