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