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)(12,16)(13,15)(17,18)(19,26)(20,31)(21,25)(22,24)(23,29)(27,30)(28,32) involution — undirected(1,3)(2,5)(4,8)(6,7)(9,11,13,12)(10,14,15,16)(17,19,21,29)(18,23,25,26)(20,30,22,28)(24,27,31,32)(10,15)(14,16)(17,18)(19,27)(20,24)(21,25)(22,31)(23,28)(26,30)(29,32) involution — undirected(2,6)(5,7)(17,20,21,22)(18,24,25,31)(19,28,29,30)(23,32,26,27)(3,8)(5,7)(9,12,13,11)(10,16,15,14)(17,20)(18,24)(19,29)(21,22)(25,31)(27,32)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.