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