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