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