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