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