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