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