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