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