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