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