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