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