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