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