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