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