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