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