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