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