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