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