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