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