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