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