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