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)(19,21)(20,25)(22,26)(23,27)(24,28)(29,31)(30,32) involution — undirected(1,2,4,6,5,7,11,12)(3,8,10,13,9,14,15,16)(17,19,22,20,24,30,23,29)(18,25,27,21,28,31,26,32)(2,7)(6,12)(8,14)(13,16)(17,20,22,30,24,29,23,19)(18,21,27,31,28,32,26,25)(1,3)(2,8)(4,10)(5,9)(6,13)(7,14)(11,15)(12,16)(17,21)(18,19)(20,27)(22,31)(23,25)(24,32)(26,29)(28,30) involution — undirected(3,9)(8,14)(10,15)(13,16)(17,22,24,23)(18,26,28,27)(19,20,30,29)(21,25,32,31)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.