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