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