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