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