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