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