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