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