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