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