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