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