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