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