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