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