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