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