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