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