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