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