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