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