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