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